twitter/twemproxy — pull request #70 by charsyam (2013-02-21 18:19:28+00:00)
Title: Hash CRC16 support.

https://github.com/twitter/twemproxy/issues/69

implementing CRC16.

but, there are too many CRC16 implementation. and they are a little bit different.

so I just follow linux kernel's implementation. and conf is below:

```c
leaf:
listen: 127.0.0.1:22121
hash: crc16
distribution: ketama
auto_eject_hosts: true
server_retry_timeout: 2000
server_failure_limit: 1
servers:
- 127.0.0.1:11212:1
- 127.0.0.1:11213:1
```